I had an interesting experience I thought I would share. I attached one of these to an ATMega328P running at 3.3V with an 8Mhz external oscillator, and uploaded some simple code to send it the AT command and listen back for “OK”. It sent the command just fine, but would spit back gibberish as the response from the board, almost as though I was listening on the wrong baud rate. After messing with it for a couple days, I finally hooked it up to an UNO, and it worked perfectly. That led me to switch out the 8Mhz oscillator on my original setup to a 16Mhz. 100% communication now. Thought I would share this in case anyone else encounters similar issues: use a 16Mhz oscillator!

Having been jilted by the dish (for the spoon), the cow tried to win her back by doing the only thing he can think of…The cow pictured here with his elaborate plan to make it over the moon using only Sparkfun products. Few believe in him.

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